The effort necessary to estimate pond surface area is directly related to your pond's shape and uniformity. The simplest method--using basic equations for common shapes--can be applied if your pond closely resembles a circle, square, rectangle, or trapezoid in shape. Square the shoreline distance and divide by , to get the pond area in acres. Multiply the length times the width to get the square feet of surface area.
Many ponds may be roughly rectangular in shape, but one side may be significantly shorter than the other. The area of this shape is best estimated using a formula for a trapezoid by taking the average length of the two unequal sides and multiplying by the width of the pond. Many ponds have an irregular shape where the surface area cannot be adequately estimated using the formulas for common geometric shapes. Three methods can be used in this case depending on the degree of accuracy you desire.
Keep in mind that the accuracy of your pond surface area estimate may be very important, especially for the safe use of aquatic herbicides. The three methods are described in order from least to most accurate. You should strive to use the most accurate method that you can reasonably accomplish. A pond surface area could be estimated by walking the perimeter of the pond and stopping at various waypoint locations along the pond shoreline. If waypoints are stored at each location where the pond shape changes, the resulting area will be extremely accurate, probably within 1 percent of the actual pond area.
Even if you do not own a GPS system, friends or family members that enjoy outdoor recreation may own a unit that could be used to estimate your pond surface area. The volume of water in ponds is often expressed in units called "acre-feet. To calculate the acre-feet of water in a pond, you'll need the surface area in acres as calculated above and an average depth of water in the pond. For a typical bowl-shaped pond the average depth can be estimated as 0.
So, a pond with a maximum depth of 12 feet would have an average depth of about 4. A more accurate method for calculating average depth is to make many measurements and calculate an average. This is most often done by measuring the pond depth along two transects--one along the width and one along the length. Make sure to pick transects that represent the shallow and deep portions of the pond. Visit the following link to see the Pond Volume Wizard:. There are two versions: the basic version and the advanced version.
The basic version asks for a length, a width and a depth. The advanced version allows you to have multiple depths in the pond.
Need help choosing pond equipment? They ensure constant supply of water and allow regulation of the amount of water to the farm allowing for diversion of what is not needed. All canals should be well designed to have the required water carrying capacity at the required rate.
If the water quantity is low and the rate of delivery is slow, pond will take too long to fill and vegetation will start to grow in the pond. Several different kinds of structure may be used to transport water to a fish farm. The most common one is the open canal. Others include pipelines and simple siphons. For small rural ponds, investing in elaborate outlets may not be necessary.
Complete drainage of the pond can be done by cutting the dyke open at one of the deepest point of the pond. Repairing the dyke should not take more than two hours. Materials that can be used to construct pond outlets and inlets include bamboo poles, PVC pipes, wood, bricks, cement blocks or concrete. Figure A cross section of a completed pond showing the position of various structures Mbugua H.
Sketch by: Mbugua Mwangi. Through experience in Kenya, one pond of m 2 will take 15 people about 8 days to complete, working 8 hours a day. Inlet canal and outlet canal : Include the cost of cement, sand, pipes, valves etc. But these averages can be skewed due to: Streams increasing the overall size Different pond basin shapes Amount of available land per area Bogs being included or excluded as part of the pond Preferences for design per owner The video below shows the Premier Ponds team building an amazing average size pond for one of our clients:.
Size Of The Average Pond. The Average Pond Depth. Share This
0コメント